Valve



Nov. 27, 1928. 1,693,177

J. H. HODQART ET A L VALVE Filed Dec. 28, 1925 In Ven tors Patented Nov.27, 1928.

yj UNITED STATES:

1,693,117 PATENT OFFICE JoHN H. HODGART AND ANDREW w. iinYnoN, orTORONTO, ONTARIO, CANADA.

VALVE.

Application filed December 28; 1925. 'Scrial No. 78 022 The inventionrelates to improvements in valves as described in the presentspecification and shown in the accompanyingdrawings that form a part ofthe same.

The main object of the invent-ion is to provide an efficient valve whichmay be produced at small cost and which when once installed will requirethe minimum of attention.

The invention consists in the novel features of construction,arrangements and combinations more particularly pointed out hereinafter.

In the drawings Figure 1 is a central vertical sectional View through avalve casing and valve.

Figure 2 is a cross sectional view taken 0 the line 22 of Figure 1.

Figure 3 is a cross sectional view taken on the line 33 of Figure 1.

Figure 4 is a side elevation of the valve.

Like numerals of reference indicate corresponding parts in the variousfigures.

Referring to the drawings 1 is a pipe which may be the cylinder in whichthe piston is adapted to operate, said piston not being shown in thedrawings, said pipe, being threaded externally at its lower end as at 2.

The valve casing is formed of upper and lower sections 3 and 4respectively, the upper section 3 having a protuberant body portion, thereduced upper end 5 being threaded interiorly to permit of securing thecasing to the pipe 1 and the reduced lower end 6 being threadedinteriorly to permit of securing the section 4 thereto, said uppersection being provided with circumferentially arranged projections fromthe inner face thereof constituting stops 7 to limit the upward movementof the valve as will be explained more fully hereinafter.

The lower section, or sleeve, 4 of the valve assembly is also tubular inform and is threaded exteriorly, as at 8, intermediate of its length topermit of securing same to the upper section 3 so that said section 4will be positioned partly within and partly without the said uppersection, the portion 9 extending into the upper section terminatingpreferably in engagement with the stops 7 and being provided with aseries of circumferentially arranged outlet ports 10 communicating withthe lower end of the ,protuberant body portion of the section 3, thewall of said portion 9 preferably being of lesser thickness than that ofthe threaded portion of the section in order to increase to a maX1- mumthe capacity of the fluid passage 11.

The sleeve 4 is provided with an interior annular flange 12 constitutinga valve seat, said seat preferably being tapered slightly as at 13. v

14 is a valve, consisting ofa cylindrical block tapered at its lowerend, as at 15, to rest on the seat 12 and sliding within the sleeve 4across the ports 10, said valve being provided with a series of acircumferential grooves 16 therearound constituting air chambers, saidvalve being of such depth that when in position on said seat the to edgethereof will be even with, or slightly lower than, the lower walls ofthe outlet ports 10, so that at all times the liquid in the casing willexert pressure on said valve to hold same to its seat.

The valve 14 is preferably cutaway from the top side thereof to providea circular concavity 17 surrounding a central stud 18, this constructionbeing adapted to reduce the weight of the valve and also to provide ameans whereby the valve may be easily'raised by {land from its seat bythe use of a suitable too Vhile a valve having a metal base contactingwith a metal seat is shown, it is of course understood that either saidseat or said base, or both, may be constructed of any suitable material,or any desirable form of lining or packing may be employed.

The portion 19 of the lower section, or sleeve 4 which is positionedWithout the casing 3 is preferably threaded exteriorly, as at. 20, topermit of securing a supporting frame 21 thereto, said frame beingprovided with legs 22 adapted to support the whole.

23 is a screen supported onthe cross members 24 carried by the frame 21for the purpose of preventing foreign matter from entering the valvecasing.

The lower end of the sleeve v4 is preferably threaded interiorly, asat'25, for the reception of a pipe, should one be required, in, whichcase the frame 21 and screen 23 are removed.

In the operation of this invention the valve 14 is drawn upwardly bysuction past the ports 10 and into engagement with the stops of saidpiston the valve drops downwardly 7 from passing said valve. In thisconnection it may be stated here that in actual practice this air sealhas been found to be so effectualthat no leakage resulted even when thevalve was raised slightlyfrom its seat. a

By this arrangement the iullweight of the fluid remaining above thevalve when'seated rests on said valve and tends to hold same firmly toits seat. What we claim is a J In a valve, the combination with atubularcasing having oppositely disposed inlet and discharge openings of lesserinternal diameter'than the body of said casing, of a sleeve threadinginto said inlet opening and having a reduced tubular extension extendinginto the body of said casing and providing an annular fluid chambertherearound, said sleeve having outlet ports at intervals therearound,the lower walls of said ports being above the bottom of said chamber,saidsleeve providing a valve seat positioned belew said chamber, and avalve slidable across said ports to alternate positions clear of saidports, said valve when in contact with said seat completely fillingthespace between the lower walls of said ports and said seat and when inits fully 'raisedposition filling the space within said sleeve abovesaid ports.

Signed at the city of Toronto, 5th day of December, 1925.

JOHN H. HODGA RT. ANDREW \V. BRYDON.

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